Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6c616f6d0dd581…

MALICIOUS

PDF

77.0 KB Created: 2020-11-20 02:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f60eef73c214cf0486c6bbf9118523b4 SHA-1: d3b49b31978dbef6df3bf5140b36dd466d449ccb SHA-256: bd6c616f6d0dd5811759c386ca768ec9066acc704d699c61d4757e9ba9280417
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/aws?utm_term=marcelo+quiroga+santa+cruz+biografia+pdf PDF link annotation
    • https://sumadapovememer.weebly.com/uploads/1/3/4/4/134494733/3911302.pdfIn PDF document text
    • https://josadezabo.weebly.com/uploads/1/3/4/4/134490641/zurob.pdfIn PDF document text
    • https://xekixudag.weebly.com/uploads/1/3/4/3/134336078/7582240.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/zediv.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7007845.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/vokujupu-pukizedukovilo.pdfIn PDF document text
    • https://bujopovuw.weebly.com/uploads/1/3/4/3/134390204/434f38905d315.pdfIn PDF document text
    • https://komanibinepo.weebly.com/uploads/1/3/4/5/134588578/mazaxumetamesefam.pdfIn PDF document text
    • https://meporolokiso.weebly.com/uploads/1/3/2/6/132681401/zavigika-dorisi-benisoponepuda.pdfIn PDF document text
    • https://rutobugexamaxip.weebly.com/uploads/1/3/4/5/134508198/wiwamune-ziwisufajep-walufes-nojapogataz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ae93e2-68c2-4e3f-a9f8-4dd59dc410a4/sentinels_of_the_multiverse_hero_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9d017d-426c-4691-b4c3-3250d256c98c/milafidodopakegefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3254a1-57a7-4403-b1cc-d5cc6ab22eca/54385718521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f86fb1-322e-4cb1-9603-4fd023fb62e8/mulojitosinoruza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 5644 bytes
SHA-256: 4060a4cecc1f1321b0c37d5a4fe9531b9971ee6fcae08f54d607f5bdfc643063
font_01_sfnt_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 10848 bytes
SHA-256: ba7af79809c51f5b5c0fb018f7ac8c8a2ffbed159053d7d66df5e59cee663b37

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